Is y = 2x + 7 a function? (For every x-value inserted, do you get a unique y-val

Question

Is y = 2x + 7 a function? (For every x-value inserted, do you get a unique y-value?)

Yes
No
POINT VALUE: 1 points

Is the relation {(0,2), (5,2), (-2,5), (3,4)} a function?

Yes
No
POINT VALUE: 1 points

If a vertical line drawn through a graph crosses it only once, the relation is a function.

True
False
POINT VALUE: 1 points

Find the inverse of the relation {(1,1), (-1,1), (2,4), (-2,4)}. Is the inverse still a function?

Yes
No
POINT VALUE: 1 points

If f(x) = 4x - 6, what is f(-3)?

6
-49
-18
-6
POINT VALUE: 1 points

If f(x) = 2x and g(x) = x-4, what is the value of f[g(3)]?

-6
-2
0
6
2
POINT VALUE: 1 points

If f(x) = 2x + 3 and g(x) = (x - 3)/2, what is the value of f[g(-5)]?

-4
-10
-7
-5
POINT VALUE: 1 points

Does the problem f[g(x)] mean that the output of the "f" function is the input of the "g" function?

Yes
No
POINT VALUE: 1 points

If f(x) = 5x - 7, what is f(2)?

-7
3
17
none of the above
POINT VALUE: 1 points

The set of all x-values in a relation is called the __________.

Entry 1:

Explanation / Answer

Is y = 2x + 7 a function? (For every x-value inserted, do you get a unique y-value?)

Yes


Is the relation {(0,2), (5,2), (-2,5), (3,4)} a function?

Yes


If a vertical line drawn through a graph crosses it only once, the relation is a function.

True


Find the inverse of the relation {(1,1), (-1,1), (2,4), (-2,4)}. Is the inverse still a function?

No


If f(x) = 4x - 6, what is f(-3)?

-18


If f(x) = 2x and g(x) = x-4, what is the value of f[g(3)]?

2

If f(x) = 2x + 3 and g(x) = (x - 3)/2, what is the value of f[g(-5)]?


-5

Does the problem f[g(x)] mean that the output of the "f" function is the input of the "g" function?

No

If f(x) = 5x - 7, what is f(2)?

3

The set of all x-values in a relation is called the __(Domain)__.

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